Ros couldn't help but notice the tone of voice in Hermione's answer. It was that sort of forced politeness that she heard all too often from those doubting those capable of some sort of far-seeing ability. Not that Ros had much of that, but she did what she could, and respected those who did better.
"I know Trelawney's done a job on the reputation of Divinations, but you can't be that ignorant of it, if only in how it reveals the mind of the speaker. You may ask someone a question, but the question speaks more about you than any answer they may give."
She stood up from the seat and held her purse before her. "You know, I don't think I need the books any longer. I've just answered my own question. The dreams don't matter - it's my reaction to them that does. You either control it, or let it control you."